Tank Mixing Eductors
-
Upload
carlos-diaz -
Category
Documents
-
view
230 -
download
0
Transcript of Tank Mixing Eductors
-
7/25/2019 Tank Mixing Eductors
1/12
A Guide to Optimizing In-Tank Agitation
and Mixing Using Eductors
Spray
Nozzles
Spray
Control
Spray
Analysis
Spray
Fabrication
-
7/25/2019 Tank Mixing Eductors
2/121.800.95.SPRAY | Intl. 1.630.665.5000 | www.spray.com
Eductors Ensure Thorough Mixing to Improve
Product Quality and Reduce Maintenance Time
Tank mixing eductors are widely used in many applications to effectively and
efficiently mix tank solutions. Offering many benefits over other approaches
such as pipes with holes, liquid agitators and pumps, tank mixing eductorsfeature different operating principles and are available in many styles, sizes
and materials. To ensure optimal mixing performance, it is important to
understand these product differences and how to specify and install eductors.
This bulletin provides guidelines to help you select the best eductor for
your application. However, many application requirements are unique and
a consultation with one of our technical experts can help ensure proper
eductor specification and placement. Our sales engineers are spray
technology experts, helping processors in hundreds of industries with
parts cleaning, washing, mixing, plating, stripping and other spray operations.
Theyre standing by and ready to help.
Tank Mixing Eductor Benefits
Ensures homogeneous fluid mix throughout the tank
More thorough mixing results in solution uniformity temperature, pH level, solids/gas dispersion
and chemical distribution to help ensure product/process quality
Eliminates sludge build-up and reduces tank cleaning time
Enables the use of small pumps to circulate large volumes of tank solution
Smaller pumps are less costly to purchase
Smaller pumps are less costly to operate
Simplifies operation and maintenance
no moving parts
Eliminates the need for compressed
or blower air and the resulting oilcontamination and/or
ventilation problems
-
7/25/2019 Tank Mixing Eductors
3/121.800.95.SPRAY | Intl. 1.630.665.5000 | www.spray.com
TANK MIXING EDUCTOR OVERVIEW
Page
6-7
8-9
10-11
46550-AIE
Air Induced Tank
Mixing Eductor
Not
Applicable
Not
Applicable
Not
Applicable
0.82 to 3 gpm
(3 to 12.1 l/min)
and
0.11 to 1.50 scfm
(3 to 48 Nl/min)
ModelInlet Flow
Rate Range*CirculationRate Range*
Effective FlowField Range*
Liquid FlowRate/Air Flow
Rate Range**
*10 to 50 psi (.5 to 4 bar). **15 to 60 psi (1 to 5 bar).
46550
Tank Mixing
Eductor
3.5 to 75 gpm
(11.3 to 308 l/min)
16.2 to 375 gpm
(53.3 to 1540 l/min)
3' to 46' offlow per second
(.91 to 14 m of
flow per second)
Not
Applicable
46550-ME
Mini Tank
Mixing Eductor
.31 to 2.9 gpm
(1 to 11.7 l/min)
1.9 to 10.7 gpm
(6.2 to 43.6 l/min)
3" to 24" of
flow per second
(7.6 to 61 cm of
flow per second)
Not
Applicable
-
7/25/2019 Tank Mixing Eductors
4/121.800.95.SPRAY | Intl. 1.630.665.5000 | www.spray.com
Guidelines for Specifying Tank Mixing Eductors
1. Start by determining the needed turnover rate
How many times per hour does the tank solution need to
circulate through the eductors? The answer is application-
dependent and based on solution viscosity and the number of
particulates. A general rule of thumb is 20 turnovers per hour
Here are some typical guidelines:
Plating and rinsing tanks:10 to 20 turnovers per hour
although some plating tanks may require more than
30 turnovers per hour
Cleaning tanks:at least 10 turnovers per hour
Heavily soiled tanks:up to 20 turnovers per hour
Critical cleaning tanks:more than 20 turnovers per hour
2. Then calculate the needed flow rate
Multiply the appropriate turnover rate
by the tank volume and then divide by 60
Example:
10 x 800 (3028.3) = 8,000 gph (30,283 l/hr)| |
turnover rate tank volumeper hour in gallons (liters)
8,000 gph 60 = 133.3 gpm
(30,283 l/hr) (504.7 l/min)
3. Determine the needed inlet flow rate
Take the gallons (liters) per minute and divide by 5
since the eductors mix at a 5:1 ratio
Example:
133.3 5 = 26.7 gpm
(504.7 5 = 100.9 l/min)
4. Determine the eductor size neededby consulting the performance table
Example:One 3/4" eductor will produce a flow rate of 27 gpm
at 40 psi (106 l/min at 3 bar). If multiple eductors are to be used
due to the configuration of the tank, take the needed inlet flow
rate and divide by the flow rate of the eductors. In this case,
using four, 1/4" eductors will provide a liquid flow rate of 28 gpm
at 40 psi (121 l/min at 3 bar)
Directional
Sweeping inElectrocoat Tanks
Mixing inElongated
Tanks
Mixing in
StratifiedLayer Tanks
-
7/25/2019 Tank Mixing Eductors
5/121.800.95.SPRAY | Intl. 1.630.665.5000 | www.spray.com
5. Determine how many eductors you need
You may need to use multiple eductors to obtain
the needed flow rate
You may want to use multiple eductors to prevent
stagnation which is a common problem in square
and rectangular tanks
In general, using multiple eductors in larger tanks
will provide more effective mixing than one centrally
located eductor
6. Determine eductor placement
Little agitation occurs below the level of the eductor,so eductors should be positioned as close as possible
to the bottom of the tank for maximum liquid turnover
If settling cannot be tolerated, install the eductors
at 1' (.3 m) above the bottom of the tank
In general, eductors should be placed so the flow field
will reach the farthest and highest liquid level at the
opposite side of the tank
Typical eductor configurations for various types
of tanks and applications are shown to the left.
Mounting adapters are available to direct flowas needed. Be sure to consult with your nozzle
manufacturer to ensure optimal placement
Typically, eductors are placed 12" (.3 m) apart for even
and uniform agitation
Tank Mixing Eductor Operating Principle
Pressurized liquid is pumped into the eductor. As the liquid
exits at high velocity, it draws surrounding solution throughthe eductors flow-through chamber. This additional liquid
flow mixes with the pumped solution and multiplies its volume.
Eductors can entrain up to five times the amount of pumped
solution depending on the eductor size and design.
A+B: Circulation Rate(Ax 4 to 6 times)
B: Entrained Liquid(Ax 3 to 5 times)
A: InletFlow Rate
NozzleFlow-throughChamber
Diffuser
Agitation in RackPlating Tanks
Mixing in
Cylindrical Tanks
-
7/25/2019 Tank Mixing Eductors
6/121.800.95.SPRAY | Intl. 1.630.665.5000 | www.spray.com
Model 46550
Tank Mixing Eductors
Large flow passages minimize clogging,
maximize liquid circulation
Benefits
Entrains four times more solution than pumped solution
Large flow opening allows particulates to pass through
with minimal clogging
Flow chamber design eliminates internal material build-up
Compact design minimizes interference with plating
racks and other in-tank equipment
Wide range of material options
In-tank mounting design eliminates the need for
above tank mounting devices
Mounting accessories simplify installation and allow easy,
precise adjustment of eductor flow (See page 12
for mounting accessories ordering information)
Ideal for use in anodizing, cleaning, electroplating,
mixing, paint booth, phosphating, plating, rinsing
and stripping applications
Specifications
Materials: Kynar*, polypropylene**, cast 316 stainless steel
Inlet Conn. (in.): 1/4, 3/8, 3/4 and 1-1/2 NPT or BSPT (M)
Effective Flow Field: 3' to 46' of flow per second
(.91 to 14 m of flow per second)
Dimensions: 3" to 10" length (76 to 254 mm);
1-1/4" to 4-1/2" (32 to 114 mm) outside diameter
4 6 5 5 0 3 / 8 P P
| | |Model Inlet Material
No. Conn. Code
Model 46550 Tank Mixing Eductors
Ordering Information
Materials
Inlet Conn.Materials
1/4 3/8 3/4 1-1/2
KY
PP
316SS
Kynar
Polypropylene
Cast 316stainless steel
Material
Code
Model 46550 eductors areavailable in a wide rangeof sizes and materialswith inlet flow rates upto 75 gpm (308 l/min).
BSPT connections require the addition of a B. Example B46550 3/8 PP.
*Maximum operating temperature with water is 220F (104C) at 50 psi (3.5 bar)
**Maximum operating temperature with water is 200F (93C) at 50 psi (3.5 bar)
-
7/25/2019 Tank Mixing Eductors
7/121.800.95.SPRAY | Intl. 1.630.665.5000 | www.spray.com
Dimensions
Net Weight oz. (kg)
Nozzle No.
Inlet Conn. (in.)
NPT orBSPT (M)
Orifice Dia.in. (mm) Lengthin. (mm) Dia.in. (mm)
KY
PP
SS
46550-1/4 1/4 3/16 (5) 3 (76) 1-1/4 (32) .51 (.01) .51 (.01)
46550-3/8 3/8 5/16 (8) 4-1/16 (103) 1-11/16 (52) 1 (.03) 9.9 (.28)
46550-3/4 3/4 3/8 (10) 6-3/8 (162) 3 (76) 2.8 (.08) 24.5 (.69)
46550-1-1/2 1-1/2 9/16 (14) 10 (254) 4-1/2 (114) 10.2 (.29) 73.5 (2.1)
Length
Dia.
Pipe Thread
Performance Data
10(.5)
15(1)
20(1.5)
25(2)
30(2.5)
35(3)
40(3.5)
50(4.0)
Nozzle
No.Flow Rate
Inlet Liquid Pressure psi (bar)
3.5(11.3)
4.3(16.0)
5.0(19.5)
5.5(23)
6.1(25)
6.6(28)
7.0(30)
7.8(32)
9.0(29)
11.0(42)
12.5(51)
14.0(59)
16.0(65)
17.0(70)
18.0(77)
20(82)
13.5(43)
17.0(64)
19.0(74)
21(85)
23(97)
25(106)
27(116)
30(124)
33(106)
40(151)
47(184)
53(215)
58(243)
63(259)
66(288)
75(308)
16.2(53.3)
19.4(75)
22.8(91.5)
25.1(107)
28.1(118)
30.6(130)
33(140)
36.8(150)
45(145)
55(210)
62.5(255)
70(295)
80(325)
85(350)
90(385)
100(410)
67.5(215)
85(320)
95(370)
105(425)
115(485)
125(530)
135(580)
150(620)
165(530)
200(755)
235(920)
265(1075)
290(1215)
315(1295)
330(1440)
375(1540)
3.0(.91)
5.0(1.5)
7.0(2.1)
8.5(2.6)
10.0(3.0)
12.0(3.7)
14.0(4.3)
17.0(5.2)
4.0(1.2)
6.0(1.8)
8.0(2.4)
10.0(3.0)
12.0(3.7)
14.0(4.3)
16.0(4.9)
22(6.7)
5.0(1.5)
8.0(2.4)
11.0(3.4)
14.0(4.3)
17.0(5.2)
20(6.1)
24(7.3)
33(10.1)
7.5(2.3)
12.0(3.7)
16.0(4.9)
20(6.1)
24(7.3)
29(8.8)
34(10.4)
46(14.0)
46550-1/4
Inlet Flow Rategpm (l/min)
Circulation Rategpm (l/min)
Effective Flow Field*ft. (m)
46550-3/8
Inlet Flow Rategpm (l/min)
Circulation Rategpm (l/min)
Effective Flow Field*ft. (m)
46550-3/4
Inlet Flow Rategpm (l/min)
Circulation Rategpm (l/min)
Effective Flow Field*ft. (m)
46550-1-1/2
Inlet Flow Rategpm (l/min)
Circulation Rategpm (l/min)
Effective Flow Field*ft. (m)
Orifice Dia.
Nozzle
*Effective Flow Field is defined as 1' (30 cm) of flow/second.
-
7/25/2019 Tank Mixing Eductors
8/121.800.95.SPRAY | Intl. 1.630.665.5000 | www.spray.com
Shown actual size.Mini Eductors are available infour capacities with inlet flowrates up to 2.9 gpm (11.7 l/min).
Mini Tank Mixing Eductor
Compact design maximizes liquid circulation and agitation
Benefits
For use in applications with lower flow rates
Entrains three to five times more solution than pumped
solution as it passes through the eductor/diffuser
Circulation is six times greater than using pipe holes or
agitation with air
Flow-through chamber minimizes clogging
Compact design simplifies mounting and is ideal for small tanks
Ideal for use in paint booth pre-treatment, etching and
plating tanks
Color-coded by flow size for quick identification
(polypropylene only)
Specifications
Materials: Polypropylene. PVDF and other similar
materials optional
Inlet Conn. (in.): 1/4 NPT or BSPT (M)
Effective Flow Field: 3" to 24" of flow per second
(7.6 to 61 cm of flow per second)
Dimensions: 1-5/8" x 11/16" (length x outside dia.)
(40 x 17 mm)
4 6 5 5 0 1 / 4 M E 1 . 5 P P
| | | | | Model Inlet Mini-Eductor Nozzle Material
No. Conn. Designation Size Code
Mini Tank Mixing Eductor
Ordering Information
Other materials available upon request. BSPT connections require the addition
of a B. Example: B46550 1/4 ME 1.5 PP.
A+B: Circulation Rate(Ax 4 to 6 times) B: Entrained Liquid
(Ax 3 to 5 times)
A: InletFlow Rate
NozzleFlow-throughChamber
Diffuser
How the Mini Tank Mixing Eductor works
Pressurized liquid is pumped through the eductor.
As liquid exits the diffuser at high velocity, surrounding
solution is entrained in the open flow-through chamber.
The combination of pumped flow and pulled flow
significantly increases circulation.
-
7/25/2019 Tank Mixing Eductors
9/121.800.95.SPRAY | Intl. 1.630.665.5000 | www.spray.com
Performance Data
Length
Orifice Dia.
Pipe ThreadDiffuser Nozzle
Dia.Dia.
Dimensions
Nozzle No.Inlet Conn. (in.)
NPT or BSPT (M)
Orifice Dia.
in. (mm)
Length
in. (mm)
Dia.
in. (mm)
46550-1/4ME-1.5 _
46550-1/4ME-2.0 _
46550-1/4ME-2.5 _
46550-1/4ME-3.0 _
1/4
1/4
1/4
1/4
.059 (1.5)
.079 (2.0)
.098 (2.5)
.118 (3.0)
1-5/8 (40)
1-5/8 (40)
1-5/8 (40)
1-5/8 (40)
11/16 (17)
11/16 (17)
11/16 (17)
11/16 (17)
* Color coding available for polypropylene material only. ** Effective Flow Field is defined as 1' (30 cm) of flow per second.
10(.5)
15(1)
20(1.5)
25(2)
30(2.5)
35(3)
40(3.5)
50(4.0)
Nozzle
No.Flow Rate
Inlet Liquid Pressure psi (bar)Color
Code*
.31(1.0)
1.9(6.2)
3.0(7.6)
.38(1.4)
2.4(8.8)
4.0(10.2)
.43(1.7)
2.7(10.8)
5.0(12.7)
.49(2.0)
3.1(12.5)
6.0(15.2)
.53(2.2)
3.4(14.0)
7.0(17.8)
.57(2.4)
3.6(15.4)
7.5(19.1)
.61(2.6)
3.9(16.7)
9.0(22.9)
.68(2.8)
4.4(17.8)
12.0(30.5)
46550-1/4ME-1.5-PP
Inlet Flow Rategpm (l/min)
Circulation Rategpm (l/min)
Effective Flow Field**in. (cm)
Orange
.56(1.8)
2.7(8.6)
5.0(12.7)
.69(2.6)
3.3(12.3)
9.0(22.9)
.79(3.1)
3.8(15.0)
10.0(25.4)
.89(3.6)
4.3(17.2)
10.5(26.7)
.97(4.0)
4.7(19.4)
12.0(30.5)
1.0(4.4)
5.0(21.3)
15.0(38.1)
1.1(4.8)
5.4(23.1)
16.0(40.6)
1.2(5.1)
6.0(24.6)
17.0(43.2)
46550-1/4ME-2.0-PP
Inlet Flow Rategpm (l/min)
Circulation Rategpm (l/min)
Effective Flow Field**in. (cm)
Green
.86(2.7)
3.2(9.9)
8.0(20.3)
1.1(4.0)
4.0(15.2)
10.0(25.4)
1.2(4.9)
4.7(19.1)
11.0(27.9)
1.4(5.7)
5.3(22.1)
12.0(30.5)
1.5(6.4)
5.9(24.7)
15.0(38.1)
1.7(7.0)
6.4(27.3)
16.0(40.6)
1.8(7.5)
6.9(29.5)
17.0(43.2)
2.0(8.2)
7.8(32.3)
21(53.3)
46550-1/4ME-2.5-PP
Inlet Flow Rategpm (l/min)
Circulation Rategpm (l/min)
Effective Flow Field**in. (cm)
Blue
1.3(4.2)
4.7(15.3)
11.0(27.9)
1.6(5.8)
5.8(21.6)
13.0(33)
1.8(7.1)
6.7(26.4)
16.0(40.6)
2.0(8.3)
7.5(30.7)
17.0(43.2)
2.2(9.3)
8.2(34.5)
20(50.8)
2.4(10.2)
8.9(37.7)
22(55.9)
2.6(11.0)
9.5(40.7)
22(55.9)
2.9(11.7)
10.7(43.6)
24(61)
46550-1/4ME-3.0-PP
Inlet Flow Rategpm (l/min)
Circulation Rategpm (l/min)
Effective Flow Field**in. (cm)
White
-
7/25/2019 Tank Mixing Eductors
10/121.800.95.SPRAY | Intl. 1.630.665.5000 | www.spray.com
Air Induced
Tank Mixing Eductors
Powerful bubbling action improves
cleaning efficiency, tank agitation
without compressed air
Benefits
Circulated liquid flow is combined with induced
air to generate small air bubbles that improve
operational efficiency
Air bubbles provide an added scrubbing action whenused for plating, dip cleaning or parts cleaning
Air bubbles elevate tank particulate and encapsulate
debris for easier filtration of tank solution when used
for mixing and agitation
Unique injector design creates a wide 30 to 50 angle
for added coverage and capture of particulates
Easily change flow rates using interchangeable
orifice plates (stainless steel models only)
Ideal for use in dip cleaning, metal particulate carry
off and liquid agitation
Specifications
Liquid Flow Rate Range: 0.82 to 3 gpm (3 to 12.1 l/min)
Materials: PVC and stainless steel
Installation Types:
Standard hook-up or wall-mount
PVC models are for wall-mount installation only
Liquid Inlet Conn. (in.):
3/8 NPT or BSPT (F) for stainless steel models
1/2 NPT or BSPT (F) for PVC models
Air Inlet Conn. (in.): 1/4 NPT or BSPT (F) All models
Air Induced Tank Mixing Eductors
Ordering Information
4 6 5 5 0 3 / 8 A I E T 1 0 S S
| | | | | | Model Inlet Eductor Installation Capacity Material
No. Conn. Type Type Code
Other materials available upon request. BSPT connections require theaddition of a B. Example B46550 3/8 AIE T 10 SS. T indicateswall-mount connection. No code required for in-tank type eductor.
Air induced tank mixingeductors are available inthree capacities with liquidinlet flow rates up to 3.0 gpm(12.1 l/min) and standard orwall-mount installation.
How the Air Induced Eductor works
Liquid flow from two orifices combines with air drawn from
outside the tank to produce a powerful flow.
Nozzle
InducedAir
Air and liquid piping provided by customer.
-
7/25/2019 Tank Mixing Eductors
11/121.800.95.SPRAY | Intl. 1.630.665.5000 | www.spray.com
Performance Data
15 (1) 20 (2) 30 (3) 40 (4) 60 (5)Nozzle No. Flow Rate
Inlet Liquid Pressure psi (bar)
.82 (3.0) .92 (4.2) 1.10 (5.0) 1.30 (5.6) 1.50 (6.2)
1.10 (4.1) 1.30 (5.7) 1.50 (7.0) 1.70 (7.8) 2.10 (8.6)
1.70 (6.3) 1.90 (8.6) 2.30 (10.0) 2.50 (11.1) 3.0 (12.1)
.11 (3.0) .15 (7.0) .24 (9.0) .34 (15.0) .54 (20)
.14 (4.0) .18 (7.0) .28 (10.0) .37 (16.0) .57 (22)
.24 (6.0) .35 (17.0) .60 (32.0) .88 (42.0) 1.50 (48)
46550-3/8AIE-5-SS
46550-3/8AIET-5-SS
46550-1/2AIET-5-PVC
46550-3/8AIE-7-SS
46550-3/8AIET-7-SS
46550-1/2AIET-7-PVC
46550-3/8AIE-10-SS
46550-3/8AIET-10-SS
46550-1/2AIET-10-PVC
Liquid Flow Rategpm (l/min)
Liquid Flow Rategpm (l/min)
Liquid Flow Rategpm (l/min)
Induced Air Flow Ratescfm (Nl/min)
Induced Air Flow Ratescfm (Nl/min)
Induced Air Flow Ratescfm (Nl/min)
Dimensions
Nozzle No.Air Inlet Conn. (in.)
NPT or BSPT (F)
Nozzle Dia.
in. (mm)
Length
in. (mm)
Width
in. (mm)
46550-3/8AIE-SS
46550-3/8AIET-SS
46550-1/2AIET-PVC
1/4
1/4
1/4
1-1/16 (27)
1-1/16 (27)
1-1/16 (27)
2-3/16 (55)
2-3/16 (55)
1-31/32 (50)
1-3/64 (26.5)
1-3/64 (26.5)
1-3/16 (30)
46550-3/8AIE-SS In-Tank 46550-3/8AIET-SS Wall-Mount 46550-1/2AIET-PVC Wall-Mount
Dia .
Length
Interchangeable
Orifice Plate
Width
Dia.
Length
Interchangeable
Orifice Plate
M22x1.5
Wall-Mount Conn.
M22x1.5
Wall-Mount Conn.
Dia .
Length
Width Width
The flow rate table is based on the following specifications: Depth of eductor from water surface: 8" (220 mm).
Induced Air Side: 5/16" (8 mm) I.D. tubing. Max. Length = 20" (500 mm).
-
7/25/2019 Tank Mixing Eductors
12/12
Kynaris a registered trademark of Arkema, Inc.
Mounting Accessories
38625 Hinged Split-Eyelet
3 8 6 2 5 + C P 2 0 5 8 2 1 - 1 / 4 P P B
| | | | Assembly Threaded Pipe Material
No. Ball Size Code
37235 Adjustable Ball-Type Assembly
Ordering Information
3 7 2 3 5 + C P 2 0 5 8 2 1 / 4 P P B
| | | | Assembly Threaded Inlet Material
No. Ball Conn. Code
*See pages 6 and 7 for eductor ordering information.
See data sheets 37235-2 and 38625 for more information.
Specifications
Inlet Conn. (in.):
Pipe size (in.):
Materials:
CP20582 Threaded Ball:
Accepts 1/4" and 3/8" (M)
Eductor:
1/4" and 3/8" sizes only
37235 AdjustableBall-Type Assembly
1/4, 3/8, 1/2
NA
Polypropylene (PP)
Required
Model 46550*
38625 HingedSplit-Eyelet
NA
1-1/4, 1-1/2
Polypropylene (PP)
Required
Model 46550*
38625 Hinged
Split-Eyelet
37235
Adjustable
Ball-Type
Assembly
North Avenue and Schmale Road, P.O. Box 7900, Wheaton, IL 60187-7901 USA
Tel: 1.800.95.SPRAY Intl. Tel: 1.630.665.5000
Fax: 1.888.95.SPRAY Intl. Fax: 1.630.260.0842
www.spray.com
SprayNozzles
SprayControl
SprayAnalysis
SprayFabrication